Writing instrument



FIG. 1 is a left side perspective view taken from the side and below showing our new design;

FIG. 2 is a left side elevational view, the right side elevational view being a mirror image thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a bottom view thereof; and

FIG. 6 is a plan view thereof; and,

FIG. 7 is a perspective view taken from the side and below showing the cap removed from one end of the writing instrument. 

The ornamental design for a “writing instrument,” as shown and described. 